Furnace-front.



J. H. HUME.

FURNAGE FRONT.

APPLIOATION FILED SMT. 25, 1911.

Patented Mar. 5, 1912 JAMES HOWDEN HUIYIE, 0F GLASGOW, SCOTLAND.

FURNACE-FRONT.

Specicaton of Letters Patent. Application filed September 25, 1911.

Patented Mar, 5, 1912.

Serial No. 651,252.

To all 'whom/15 may concern Be it known that I, JAMES Hownnu HUME, a subject of the King of the United Kingdom of Great Britain and Ireland, and re- 'siding at Glasgow, Scotland, have invented a certain new and useful Improvement in Furnace-Fronts, of which the following is a specification.

This invention relates to improvements in furnace fronts for marine or land boilers of the cylindrical, niultitubular, Lancashire;

Cornish, water-tube or other kinds, more particularly of the well-known Howden type of furnace front used in forced draft installations and it consists in an improved construction in which the base ort1on of the firing entrance of the front 1s so arranged that it can be readily removed to permit the necessary volume of air to be supplied to the furnace through the 'intermediary of the usual side air-control valves when. liquid fuel is to be employed in lieu of coal.

The furnace front, on which the present invention is an improvement, is shown and described in U. S. patent to Howdem'No. 923,178, dated June 1, 1909.

The invention is illustrated ,in the accompanying drawings in which- Figure-1 is a part velevation part vertical section and Fig. 2 is a cross section showing a furnace front fitted with a removable. base portion as aforesaid.

Referring to the' drawings, .the furnace front A is of usual construction having side airsupply valves B mounted on a rotatable spindle C and having an upper air supply valve D; but, according to the invention, the base portion E 'of the front at the firing entrance is made portable so that, on removal of the said base, a gap orbpening is formed, whereby the necessary volume of air 'from the side valves B to sup ort combustion will be able to pass to the fiirnace, liquid fuel may be advantageously em ployed. y

The air supply from the air trunk or upper su ply p1 e is controlled by the upper valve D rom w ich the air flows as denoted so that by the arrows. When liquid fuel is to be burned the removable base portion E is taken out to afford a more ready flow of air to the furnace from the port-s controlled by the lower side valves B, as above indicated.

In the instance shown, the base portion E is provided with front and rear Hanges F and G and is mounted on the valverspindle C, caps H cooperating with endlugs I on the base to secure'it in position..

What I claim is K l. In a furnace, the combination with valves B located at the sides ofthe lowerl part of the furnace front with a sppee or gap between them, said valves serving toI control or regulate a forced-draft supply of air to the furnace, of an upper valve controlling the inletof the air from above,a removable base portion located in the said space or gap between said valves B at the firing front of the yfurnace and which re- Imovable base portion may bevtaken out, when desired', to permit the necessary vol'- umeof air to be supplied to the furnace when liquid fuel is to be employed.

2. In a furnace, the combination-with valves B located at the sides ofthe lower part of the furnace front, with a space or gap between them, said valves serving to control or regulate a forced draft supplyfof air to the furnace, of an upper valve con- -trolling the 'inlet of air from above, a rotatable spindle on which said valves B are mounted, a removable base portion located in the said space or gap between said valves at the firing front of the furnace and having front and rear depending flanges, by whio it is litted in place, and also having portions in which said spindle'is rotatively mounted,

so that said spindle may removably secure said base portion in place. y y Inv testimony whereof I have signed my.

name to this ,specificationin the presence of two subscribmg witnesses.

J. HOWDEN HUME.

Witnesses? 4 VVALLAUE IIRANSTON FAInwnATHER, THOMAS BISHOP GRAHAM. 

